Finding the Fourth Proportional to 1,342.72, 2,013.94 and 612.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.72 : 2,013.94 = 612.10 : x
2. Step 2: Convert to fraction form
   1,342.72/2,013.94 = 612.10/x
3. Step 3: Cross multiply
   1,342.72x = 2,013.94 × 612.10
4. Step 4: Simplify right side
   1,342.72x = 1,232,732.67
5. Step 5: Solve for x
   x = 1,232,732.67/1,342.72
6. Step 6: Final answer
   x = 918.09